MLE Bearings - NTN

ntn.co.jp

MLE Bearings - NTN

For New Technology Network

corporation

R

MLE

Bearings

BEAREE

@


MLE bearings are environmentally-friendly, clean, lead-free sliding

bearings that exhibit excellent sliding characteristic under high

surface pressures. The "E" in MLE stands for "eco-material."

1.

Features

3.

Structure

¡Oilless sliding bearings capable of use with great

loads

¡Useable in a wide temperature range from very low to

very high temperatures

¡Thin walls (1.0 to 2.5 mm) help realize a very

compact design

¡Low friction coefficient (: 0.040.20)

¡Boasts excellent wear resistance and is capable of

operation for a long time

The structure of an MLE bearing is comprised of three

layers -- a steel sheet as a backing metal, a porous

sintered layer prepared by sintering bronze powder on

the steel sheet and a resin layer formed by

impregnating the porous sintered layer with a silicone

tetrafluoride resin that contains a special filler. This

structure boasts a greater load bearing capacity and

good heat dissipation performance, and it can operate

for a prolonged period without needing relubrication.

The steel sheet backing metal is tin-plated for better

corrosion resistance.

2.

Characteristics

Sintered layer

Resin layer

Allowable surface

pressure

49MPa137MPa

500kgf/cm 2 1400kgf/cm 2

Allowable sliding

velocity

100m/min

Allowable PV value

98MPam/min1000kgf/cm 2 m/min

Steel sheet

Operating

temperature range

200˚C260˚C

Values in ( ) were obtained in a static loading condition and the test

results are from NTN bearing test methods.


MLE Bearings

4.

Allowable PV values

A PV value is expressed as the product of a surface

pressure P and a sliding velocity V, wherein the PV

values possible with a normally operating bearing are

the allowable PV values for that bearing.

Allowable

surface pressure P

137MPa

1400kgf/cm 2

Allowable

operating range

Allowable PV values

98MPam/min

1000kgf/cm 2 m/min

Allowable sliding velocity V

100m/min

5.

Estimated wear

The amount of wear on a given bearing can vary depending on the sliding velocity, surface pressure, operating

mode, lubrication conditions, surface roughness of the mating material, ambient temperature and other parameters

related to that bearing. Usually, the amount of wear for a particular bearing can be determined with the expression

below:

R=KPVT

where, Rmm of wear

Kspecific wear mm 3 /Nm

Non-lubricationK=1.710 -7 oil-lubricationK=1.710 -9

Psurface pressure in MPa

Vsliding velocity in m/min

Ttime in min

To help minimize the amount of wear, we recommend the use of a shaft with a surface roughness that ranges from

0.1 to 0.8 mRa and a hardness that is higher than 22 HRC.

6.

Fit and clearance

7.

Installation method

The recommended values for the shaft and housing

for MLE and MLEF bearings are given in the

dimensions table.

Assuming that the housing is a rigid body and its wall

thickness does not vary when it is press-fit, the

clearance between an MLE or MLEF bearing and its

shaft can be defined as follows:

Minimum clearance =

(housing I.D. min - 2max wall thickness)max shaft dia.

Maximum clearance =

(housing I.D. max - 2min wall thickness)min shaft dia.

If you intend to use a shaft or housing that has a

diameter other than one that is recommended, be

extremely careful to provide an acceptable clearance.

When press-fitting an MLE bearing, do not drive it in

with a hammer etc.

For the press-fitting operation, use a press-fitting tool /

mandrel like the one illustrated below. Provide a

sufficiently large guide surface on the inlet of the

housing, center the shaft with the housing bore, and

then press-fit the bearing using a press.

Preferable types of chamfering are R-chamfering and

taper-chamfering. When using C-chamfering (C1.0 or

lower), make sure that the chamfered area is free from

burs.

Press ram

D

Press-fitting rod

d

Bearing

Housing

Press-fitting rod dimensions: Dhousing I.D.0.30.4

d bearing I.D.0.20.3


Dimension table for MLE bearings

8.

MLE Bearings

0.75

3

4

5

6

7

8

9

10

12

13

14

15

16

17

18

19

20

22

24

25

26

28

30

31

32

35

38

40

45

50

55

60

65

70

75

80

85

90

95

100

105

110

120

130

140

150

160

5

6

7

8

9

10

11

12

14

15

16

17

18

19

20

22

23

25

27

28

30

32

34

35

36

39

42

44

50

55

60

65

70

75

80

85

90

95

100

105

110

115

125

135

145

155

165

d

D

MLE0404

MLE0504

4

MLE0305

MLE0505

MLE0605

MLE0705

MLE0805

5

MLE0306

MLE0406

MLE0506

MLE0606

MLE0806

MLE1006

MLE1206

6

MLE0607

MLE0707

MLE0807

MLE0907

MLE1007

7

MLE0408

MLE0508

MLE0608

MLE0808

MLE1008

MLE1208

MLE1308

MLE1508

8

MLE0610

MLE0710

MLE0810

MLE0910

MLE1010

MLE1210

MLE1310

MLE1410

MLE1510

MLE1610

MLE1810

MLE1910

MLE2010

MLE2210

MLE2410

MLE2510

MLE2810

MLE3010

10

MLE0712

MLE0812

MLE1012

MLE1212

MLE1412

MLE1512

MLE1612

MLE1812

MLE2012

MLE2212

MLE2512

MLE2812

MLE3012

MLE3512

MLE4012

MLE5012

12

MLE1015

MLE1215

MLE1315

MLE1415

MLE1515

MLE1615

MLE1715

MLE1815

MLE1915

MLE2015

MLE2215

MLE2415

MLE2515

MLE3015

MLE3115

MLE3515

MLE4015

MLE5015

MLE6515

MLE7015

MLE8015

15

MLE1020

MLE1220

MLE1420

MLE1520

MLE1620

MLE1720

MLE1820

MLE2020

MLE2220

MLE2520

MLE2820

MLE3020

MLE3220

MLE3520

MLE3820

MLE4020

MLE4520

MLE5020

MLE6020

MLE7020

MLE7520

MLE8020

MLE9020

MLE11020

MLE13020

20

MLE1525

MLE1625

MLE1825

MLE2025

MLE2225

MLE2425

MLE2525

MLE2825

MLE3025

MLE3225

MLE3525

MLE3825

MLE4025

MLE4525

MLE5025

MLE5525

25

MLE2030

MLE2230

MLE2430

MLE2530

MLE2630

MLE2830

MLE3030

MLE3230

MLE3530

MLE4030

MLE4530

MLE5030

MLE5530

MLE6030

MLE6530

MLE7030

MLE7530

MLE8030

MLE8530

MLE9530

MLE10030

MLE11030

30

LengthL 0

-0.4

R-MLE

Length

Inner diameter

Model code

Indication of Serial Number

MLE2535

MLE3035

MLE3235

MLE3535

MLE4035

MLE4535

MLE5035

MLE5535

MLE6035

MLE7035

MLE7535

MLE9035

MLE10035

MLE11035

35

Inner

diameter

Outer

diameter


MLE Bearings

3

4

5

6

7

8

9

10

12

13

14

15

16

17

18

19

20

22

24

25

26

28

30

31

32

35

38

40

45

50

55

60

65

70

75

80

85

90

95

100

105

110

120

130

140

150

160

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.097

0.099

0.102

0.102

0.105

0.105

0.108

0.108

0.111

0.111

0.111

0.111

0.111

0.114

0.114

0.127

0.127

0.127

0.127

0.127

0.127

0.131

0.131

0.135

0.135

0.135

0.135

0.135

0.155

0.160

0.165

0.165

0.185

0.185

0.185

0.190

0.195

0.195

0.195

0.195

0.195

0.195

0.200

0.205

0.205

0.205

0.205

5

6

7

8

9

10

11

12

14

15

16

17

18

19

20

22

23

25

27

28

30

32

34

35

36

39

42

44

50

55

60

65

70

75

80

85

90

95

100

105

110

115

125

135

145

155

165

MLE2540

MLE3040

MLE3140

MLE3240

MLE3540

MLE3840

MLE4040

MLE4540

MLE5040

MLE5540

MLE6040

MLE6540

MLE7040

MLE7540

MLE8040

MLE8540

MLE9040

MLE9540

MLE10040

MLE11040

MLE12040

MLE15040

40

MLE3250

MLE3550

MLE4050

MLE4550

MLE5050

MLE6050

MLE6550

MLE7050

MLE7550

MLE8050

MLE8550

MLE9050

MLE10050

MLE10550

MLE11050

MLE12050

MLE13050

MLE14050

MLE15050

MLE16050

50

MLE5060

MLE5560

MLE6060

MLE6560

MLE7060

MLE7560

MLE8060

MLE8560

MLE9060

MLE11060

60

MLE6070

MLE6570

MLE10070

MLE11070

MLE12070

MLE14070

70

MLE5080

MLE7080

MLE7580

MLE8080

MLE8580

MLE13080

MLE14080

MLE15080

MLE16080

80

MLE9090

90

MLE10095

MLE10595

MLE11095

MLE12095

95

MLE140100

MLE150100

MLE160100

100 Min. Max.

0.025

0.035

0.012

0

0.025

0.037

0.025

0.037

0.025

0.037

0.025

0.040

0.025

0.040

0.025

0.040

0.025

0.040

0.025

0.043

0.025

0.043

0.025

0.043

0.025

0.043

0.025

0.043

0.025

0.043

0.025

0.043

0.025

0.046

0.025

0.046

0.025

0.046

0.025

0.046

0.025

0.046

0.025

0.046

0.025

0.046

0.025

0.046

0.025

0.050

0.025

0.050

0.025

0.050

0.025

0.050

0.025

0.050

0.025

0.050

0.025

0.050

0.015

0

0.018

0

0.021

0

0.025

0

0.030

0

0.035

0

0.040

0

0.025

0.055

0.025

0.055

0.035

0.005

0.035

0.005

0.035

0.005

0.035

0.005

0.035

0

0.035

0

0.035

0

0.035

0

0.035

0

0.035

0

0.035

0

0.035

0.005

0.035

0.005

0.035

0.005

0.035

0.005


T

1.0

1.5

2.0

2.5

2.47

0

0.025

0

0.030

0

0.040

0

0.050

0

0.030

H7

0.012

0

H7

H7

0.015

0

H7

0.015

0

H7

0.015

0

H7

H7

0.018

0

H7

0.018

0

H7

0.018

0

H7

0.018

0

H7

0.018

0

H7

0.018

0

H7

H7

0.021

0

H7

0.021

0

H7

0.021

0

H7

0.021

0

H7

0.021

0

H7

0.021

0

H7

0.021

0

H7

H7

0.025

0

H7

0.025

0

H7

0.025

0

H7

0.025

0

H7

0.025

0

H7

0.025

0

H7

0.025

0

H7

H7

0.030

0

H7

0.030

0

H7

0.030

0

H7

0.030

0

H7

0.030

0

H7

H7

0.035

0

H7

0.035

0

H7

0.035

0

H7

0.035

0

H7

0.035

0

H7

0.035

0

H7

H7

0.040

0

H7

0.040

0

H7

0.040

0

H7

0.040

0

H7

LengthL 0

-0.4

Wall

thickness

Recommended dimensions

Shaft

H7 Housing

Dimensions to be measured at 25˚C / Unit in mm

Installed clearance

(When installed to H7 cemented carbide housing)

d D

30˚

20˚

Interface

0.5

T

l

NOTE: The chamfering dimensions for bushes with outside diameters of 10 mm

or smaller or lengths 7 mm or smaller somewhat differ from those

illustrated—the dimensions are post-chamfering dimensions.

0.75


MLE Bearings

9.

Dimension table for MLEF bearings

Small split permissible

l

R3.5 max.

Wall thickness T1

Inner Outer Flange

diameter diameter O.D.

d D FD

5

6

7

7

8

9

10

12

13


MLEF0504


MLEF0505

MLEF0605

LengthL 0

-0.4


MLEF0606


MLEF0607


MLEF0608


MLEF0610

FD 0

-0.8

30˚

R Notes 1)

0.75

0.5

20˚

D

8

10

12

14

15

16

10

12

14

16

17

18

15

18

20

22

23

24

MLEF0806

MLEF1006

MLEF1206

MLEF0808

MLEF1008

MLEF1208

MLEF0810

MLEF1010

MLEF1210

MLEF1410

MLEF1510

MLEF1610

18

20

26

MLEF1810

Wall thickness T2

20

23

31

MLEF2010

Notes

1. Dimension R in the above diagram is 0.75 or smaller when the wall

thickness T1 = 1.0, and 1.0 or smaller when the wall thickness

T1 = 1.5 or greater.

2. The chamfering dimensions for bushes with outside dia. 10 mm or

smaller or lengths 7 mm or smaller somewhat differ from those

illustrated—the dimensions are post-chamfering dimensions.

22

24

25

26

28

30

25

27

28

30

32

34

33

35

36

38

40

42

MLEF2210

MLEF2510

31

35

45

Indication of Serial Number

R-MLEF

Length

Inner diameter

Model code

32

35

38

40

45

50

55

60

36

39

42

44

50

55

60

65

46

49

52

54

60

65

70

75

10.

Dimension table for MLEW bearings

Knock-pin hole

: 1 pos.

P.C.D

d

D

Indication of Serial Number

R-MLEW

T

Recess

Bush inside dia.

Model code

Bush

Bush

I.D.

MLEW

I.D. of

bush used

with MLEW

6

8

10

12

14

16

18

20

22

24

25

30

35

40

45

50

Model

number

MLEW06

MLEW08

MLEW10

MLEW12

MLEW14

MLEW16

MLEW18

MLEW20

MLEW22

MLEW24

MLEW25

MLEW30

MLEW35

MLEW40

MLEW45

MLEW50

Inner

diameter

Outer

diameter

Wall

thickness

d

D

T

mm mm mm

8 +0.25

0

10 +0.25

0

12 +0.25

0

14 +0.25

0

16 +0.25

0

18 +0.25

0

20 +0.25

0

22 +0.25

0

24 +0.25

0

26 +0.25

0

28 +0.25

0

32 +0.25

0

38 +0.25

0

42 +0.25

0

48 +0.25

0

52 +0.25

0

16 0

-0.25

18 0

-0.25

24 0

-0.25

26 0

-0.25

30 0

-0.25

32 0

-0.25

36 0

-0.25

38 0

-0.25

42 0

-0.25

44 0

-0.25

48 0

-0.25

54 0

-0.25

62 0

-0.25

66 0

-0.25

74 0

-0.25

78 0

-0.25

1.5 -0.03

-0.08

1.5 -0.03

-0.08

1.5 -0.03

-0.08

1.5 -0.03

-0.08

1.5 -0.03

-0.08

1.5 -0.03

-0.08

1.5 -0.03

-0.08

1.5 -0.03

-0.08

1.5 -0.03

-0.08

1.5 -0.03

-0.08

1.5 -0.03

-0.08

1.5 -0.03

-0.08

1.5 -0.03

-0.08

1.5 -0.03

-0.08

2.0 -0.03

-0.08

2.0 -0.03

-0.08


MLE Bearings




LengthL 0

-0.4




Wall thickness

T T

Dimensions to be measured at 25˚C / Unit in mm

Recommended dimensions Installed clearance

(When installed to H7 cemented carbide housing)

Shaft

H7 Housing

Min.

Max.

MLEF0712

MLEF0812

MLEF1012

MLEF1212

MLEF1412

MLEF1512

MLEF1612

MLEF1812

MLEF2012

MLEF2212

MLEF2512

MLEF3012

MLEF3512

MLEF4012

MLEF1015

MLEF1215

MLEF1415

MLEF1515

MLEF1615

MLEF1815

MLEF2015

MLEF2215

MLEF2515

MLEF2615

MLEF3015

MLEF1220

MLEF1420

MLEF1520

MLEF1620

MLEF1820

MLEF2020

MLEF2220

MLEF2520

MLEF2620

MLEF3020

MLEF3520

MLEF4020

MLEF5020

MLEF1525

MLEF1625

MLEF1825

MLEF2025

MLEF2225

MLEF2525

MLEF3025

MLEF3125

MLEF3525

MLEF4525

MLEF2030

MLEF2430

MLEF2530

MLEF2830

MLEF3030

MLEF3230

MLEF3530

MLEF4030

MLEF5030

MLEF6030

MLEF3040

MLEF3540

MLEF3840

MLEF4040

MLEF4540

MLEF5040

MLEF6040

MLEF3550

MLEF4050

MLEF4550

MLEF5060

MLEF5560

MLEF6060

1.0

1.5

2.0

2.5

0

0.025

0

0.030

0

0.030

0

0.040

1.0

1.5

2.0

2.5

0

0.2

0

0.2

0

0.2

0

0.3

5

6

7

8

10

12

14

15

16

18

20

22

24

25

26

28

30

31

32

35

38

40

45

50

55

60

0.025

0.037

0.025

0.037

0.025

0.040

0.025

0.040

0.025

0.040

0.025

0.043

0.025

0.043

0.025

0.043

0.025

0.043

0.025

0.043

0.025

0.046

0.025

0.046

0.025

0.046

0.025

0.046

0.025

0.046

0.025

0.046

0.025

0.046

0.025

0.050

0.025

0.050

0.025

0.050

0.025

0.050

0.025

0.050

0.025

0.050

0.025

0.050

0.025

0.055

0.025

0.055

0.015

0

7 H7

8

9

10

12 H7

14

16

17

18

20 H7

23

25

27

28

30

32 H7

34

35

36

39

42

44

50

55

60

65

0.015

H7 0

0.015

H7 0

0.015

H7 0

0.018

0

0.018

H7 0

0.018

H7 0

0.018

H7 0

0.018

H7 0

0.021

0

0.021

H7 0

0.021

H7 0

0.021

H7 0

0.021

H7 0

0.021

H7 0

0.025

0

0.025

H7 0

0.025

H7 0

0.025

H7 0

0.025

H7 0

0.025

H7 0

0.025

H7 0

0.025

H7 0

0.030

H7 0

0.030

H7 0

0.030

H7 0

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.025

0.102

0.102

0.105

0.105

0.108

0.111

0.111

0.111

0.111

0.114

0.127

0.127

0.127

0.127

0.127

0.131

0.131

0.135

0.135

0.135

0.135

0.135

0.155

0.160

0.165

0.165

Dimensions to be measured at 25˚C / Unit in mm

Knock-pin

hole dia.

mm

1.1001.300

1.1001.300

1.6251.875

2.1252.375

2.1252.375

2.1252.375

3.1253.375

3.1253.375

3.1253.375

3.1253.375

4.1254.375

4.1254.375

4.1254.375

4.1254.375

4.1254.375

4.1254.375

P.C.D at

knock-pin

location

mm

12 0.12

14 0.12

18 0.12

20 0.12

23 0.12

25 0.12

28 0.12

30 0.12

33 0.12

35 0.12

38 0.12

43 0.12

50 0.12

54 0.12

61 0.12

65 0.12

Depth of recess

in housing

mm

0.951.20

0.951.20

0.951.20

0.951.20

0.951.20

0.951.20

0.951.20

0.951.20

0.951.20

0.951.20

0.951.20

0.951.20

0.951.20

0.951.20

1.451.70

1.451.70

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